Material for wall-coating and method of making same



I06. COMPOSITIONS,

' W N r1 IA [n5 COATING OR PLASTIC.

,1 cross Reference EDWARD WATSON, or. GRAND RAPIDS, MICHIGAN.

MATVERIAVL FORWALL-COATING AND METHOD OF MAKING SAME.

srncxrxcn'rroiv forming part tr Letters latent No. 522,637, dated July 10,1894.

Application filed Ifebruary 12, 1894.

7 To all whom it mag concern.-

Be it known that I, EDWARD WATSON, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of 5 Michigan, have invented certain new and useful Improvements in Material for Wall-Coating and Methods of Making the Same, of which the following is a specification.

My invention relates to that class of adhero sive compounds for wall coating, containing calcined gypspg as the principal i ment or pept -areal ad hesiv ugept. Suc com-' pounds are prepared in a dr powder, ready for use by mixing with water. To these com- 5 pounds coloring matter or ain ts may be added, an y somem'anufac urers various metallic salts may be added to the compound.

"IHdidli''iii'rb agent generally entering into these compounds is glue, which is incorporated with the calcined gypsum eitherin the dry form and then re round or the liquid is first mixed wit 0 ,cined gypsum and hen dried and 'round. All compounds for this purpose, which contain glue in its pure form, are subject to certain disadvantages pertaining to the nature of glue.

The object of my invention is to make an improved adhesive compound, free from many of the objections pertaining to such products generally offered to the public.

By my process I produce an adhesive wall coating compound which may be used by simply mixing with water; which does not change its condition after being mixed with water, and holds up the pigments without settling; has good body or covering power; is easy of application to the wall,-and when dry does not crack or scale 05. I

The process by which I make my improved o adhesive wall coating compound is about as follows. Starting out with lue,I may take g dr lue or its equivalent (1L an ity of liqu d lue as made by the glue maker before dry- Estimating the glue as dry, I take of 5 dry animal glue one hundred pounds, then add 0 1 twenty five gallons of water let the mixture resta few minutes, theififi'd't o it five pounds of n (recently burned or slgkgd) then boil t 1 mixture half an Hour "wit 0c casional stirring, and then add to it twenty five pounds of water la ss sirup (either that made by potash or 322E, and continue to Serial No.499.968. (No specimens.) AZ 77 stir the mixture for a few minutes longer, then add to the mixture twenty pounds of sulphate of ma nesia, and occasionally stir EH e m' ixture tor se"ve'i'T minutes longer without boiling, then thoroughly incorporate with the adhesive mixture one thousand pounds of calcined a sum then expel the water by Heat, and subsequently reduce the product to a very fi'ne' powder, which constitutes my improved adhesive wall coating compound, which may be used at any subsequent time by simply mixing with water.

The above described proportions and exact steps taken may be changed or modified without departing from the spirit of my invention or impairing the usefulness of the product;

' It may be stated that in this process the.

properties of the glue have been changed and 7c a new chemical substance produced, which is wanting inh the essential property at glulei which is: t at the liquid does not w on co be pniegelatindus. e

' It will be observed that the adhesive mlx- 7 5 ture as above described, contains when ready I to incorporate with the calcined ypsum-E the chan ed lue sulpha e 0 so a or o ash; silicate 0% Iim e an ma nesia magnesia fly-z rate, and s 1 ica hydrate. Kllo w 10 p ay; 80 a very important part, not only in the process of incorporating the adhesive mixture with the calcined gypsum, but especially in the practical working of the adhesive compound when mixed with water for use, and in its power to ultimately set as a true cement on the wall, and contribute to its hardness and beauty of finish.

The essentialelement in my inventiondoes not rest in the mere matter of boiling glue with water and an alkali, which is not new, but my invention rests upon the inherent properties of the adhesive matter when treated in practically the manner set forth, and especially upon the entire combination of ingredients contained in the finished product.

In manufacturing material by my process in case it may be desirable to add to the compound any col ri matter or aints or certain metallic salts such addifis'o may be made at any siage of the process, or be added tofitie'finishedproducti 'lis to-the manner of incorporating the ad- PA ENT; Flu nt? hesive mixture with the calcined gypsum, it may be effected in any manner why any means which may be best suited to the manufactures, and may be in an open receptacle or 5 closed until the mixture is heated to about 212 Fahrenheit, when the water should be allowed to evaporate, and during the process of mixing or drying, the mixture should be occasionally or constantly stirred.

The calcined gy sum may be cold WIJGLI mixed with the adhesive mixture, and heat applied to expel water, or the calcined gyp-' sum may be first heated for the purpose, or advantage taken of the heat contained in the 15 calcined gypsum at the completion of the caloining process, and by regulating the heat the adhesive mixture may be introduced directly into the calcining kettle at the termination of the calcining process and then stirred un- 20 til dry. l

In dr ing this compound the heat should general y be kept near ZLZLEahrenheit, but with caution it may be somewhat increased to hasten the expulsion of the water.

I claim The process of manufacturing a wall coating compound, which consists of the following steps: first, adding water to animal glue, then 7 adding lime, then boiling the mixture, adding to it water-glass sir-tip, then adding enlphate of magnesia, then incorporating the adhesive mixture with calcined gypsum, then drying the compound, and subsequently reducing the product toa very fine powder, substantially as described.

EDWARD WATSON.

Witnesses: 7

J AS. B. RUSSELL, ALICE J. FRALICK. 

